“Entourage” actor Adrian Grenier cohosted a celebrity–filled reception on April 19 at the ABC Carpet & Home Showroom in Manhattan’s Flatiron District.

Susan Sarandon was in attendance and the event featured musical performances by Rufus Wainwright, Sara Bareilles, and Amy Ray of the Indigo Girls.

Grenier said in an interview with Refinery29 about the event he would not speak about the upcoming “Entourage” movie—set to start filming at the end of the summer—until executive producer Mark Wahlberg and the rest of the “Entourage” crew joins the fight against fracking.